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- /*-------------------------------------------------
- POEPOEM.C -- Demonstrates User-Defined Resource
- (c) Charles Petzold, 1996
- -------------------------------------------------*/
-
- #include <windows.h>
- #include "poepoem.h"
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- char szAppName[10] ;
- char szCaption[35] ;
- HINSTANCE hInst ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- HWND hwnd ;
- MSG msg ;
- WNDCLASSEX wndclass ;
-
- LoadString (hInstance, IDS_APPNAME, szAppName, sizeof (szAppName)) ;
- LoadString (hInstance, IDS_CAPTION, szCaption, sizeof (szCaption)) ;
-
- wndclass.cbSize = sizeof (wndclass) ;
- wndclass.style = CS_HREDRAW | CS_VREDRAW ;
- wndclass.lpfnWndProc = WndProc ;
- wndclass.cbClsExtra = 0 ;
- wndclass.cbWndExtra = 0 ;
- wndclass.hInstance = hInstance ;
- wndclass.hIcon = LoadIcon (hInstance, szAppName) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
- wndclass.hIconSm = LoadIcon (hInstance, szAppName) ;
-
- RegisterClassEx (&wndclass) ;
-
- hInst = hInstance ;
-
- hwnd = CreateWindow (szAppName, szCaption,
- WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
- {
- static char *pText ;
- static HGLOBAL hResource ;
- static HWND hScroll ;
- static int iPosition, cxChar, cyChar, cyClient, iNumLines, xScroll ;
- char szPoemRes[15] ;
- HDC hdc ;
- PAINTSTRUCT ps ;
- RECT rect ;
- TEXTMETRIC tm ;
-
- switch (iMsg)
- {
- case WM_CREATE :
- hdc = GetDC (hwnd) ;
- GetTextMetrics (hdc, &tm) ;
- cxChar = tm.tmAveCharWidth ;
- cyChar = tm.tmHeight + tm.tmExternalLeading ;
- ReleaseDC (hwnd, hdc) ;
-
- xScroll = GetSystemMetrics (SM_CXVSCROLL) ;
-
- hScroll = CreateWindow ("scrollbar", NULL,
- WS_CHILD | WS_VISIBLE | SBS_VERT,
- 0, 0, 0, 0,
- hwnd, (HMENU) 1, hInst, NULL) ;
-
- LoadString (hInst, IDS_POEMRES, szPoemRes, sizeof (szPoemRes)) ;
-
- hResource = LoadResource (hInst,
- FindResource (hInst, szPoemRes, "TEXT")) ;
-
- pText = (char *) LockResource (hResource) ;
-
- iNumLines = 0 ;
-
- while (*pText != '\\' && *pText != '\0')
- {
- if (*pText == '\n')
- iNumLines ++ ;
- pText = AnsiNext (pText) ;
- }
- *pText = '\0' ;
-
- SetScrollRange (hScroll, SB_CTL, 0, iNumLines, FALSE) ;
- SetScrollPos (hScroll, SB_CTL, 0, FALSE) ;
- return 0 ;
-
- case WM_SIZE :
- MoveWindow (hScroll, LOWORD (lParam) - xScroll, 0,
- xScroll, cyClient = HIWORD (lParam), TRUE) ;
- SetFocus (hwnd) ;
- return 0 ;
-
- case WM_SETFOCUS :
- SetFocus (hScroll) ;
- return 0 ;
-
- case WM_VSCROLL :
- switch (wParam)
- {
- case SB_TOP :
- iPosition = 0 ;
- break ;
- case SB_BOTTOM :
- iPosition = iNumLines ;
- break ;
- case SB_LINEUP :
- iPosition -= 1 ;
- break ;
- case SB_LINEDOWN :
- iPosition += 1 ;
- break ;
- case SB_PAGEUP :
- iPosition -= cyClient / cyChar ;
- break ;
- case SB_PAGEDOWN :
- iPosition += cyClient / cyChar ;
- break ;
- case SB_THUMBPOSITION :
- iPosition = LOWORD (lParam) ;
- break ;
- }
- iPosition = max (0, min (iPosition, iNumLines)) ;
-
- if (iPosition != GetScrollPos (hScroll, SB_CTL))
- {
- SetScrollPos (hScroll, SB_CTL, iPosition, TRUE) ;
- InvalidateRect (hwnd, NULL, TRUE) ;
- }
- return 0 ;
-
- case WM_PAINT :
- hdc = BeginPaint (hwnd, &ps) ;
-
- pText = (char *) LockResource (hResource) ;
-
- GetClientRect (hwnd, &rect) ;
- rect.left += cxChar ;
- rect.top += cyChar * (1 - iPosition) ;
- DrawText (hdc, pText, -1, &rect, DT_EXTERNALLEADING) ;
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY :
- FreeResource (hResource) ;
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
- }
-